不加。“changeisagoodthing”这个短语中，“change”是主语，“is”是系动词，“agoodthing”是表语，因此，正确的语法结构是“changeisagoodthing”，不需要在“change”前面加“a”。
一定加a。“Changeiagoodthing”是一个固定表达，意思是改变是好事。在这个表达中，“a”是必须的，因为“thing”是一个单数可数名词，需要用不定冠词“a”或“an”来修饰。
Change is a Good ThingUrbec, KarenFlorida Libraries
apeople are always telling you that change is a good thing ,but all they are really saying is that something that you didn't want to happen at all has happened . 人们是总告诉您变动是一件好事,但全部他们真正地说是您不要根本发生的事发生了。[translate]...
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Some people thrive on change; others will do all they can to resist it. But are those who advocate that change is a good thing, always right? INCH sought the opinions of those with something to say Change is not always a good thing. It may force us out of tired habits and impose be...
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Sometimes we need to move on to be respectful of ourselves. Embrace the idea that life is about change, and that change is a good thing, we end up better off in the long run. - Rhee Gold
IsChangeAlwaysaGoodThing Is Change Always a Good Thing?Some people prefer to spend their lives doing the same things and avoiding change.Others, however, think that change is always a good thing.No matter what it is, everything can have its two sides. Change is without exception. Those who...
a回美国 Returns to US[translate] aSome people prefer to spend their lives doing the same things and avoiding change. Others, however, think that change is always a good thing. Discuss both views and give your own opinion. 某些人喜欢度过他们的做同样事和避免变动的生活。 其他,然而,认为变动总...